COG’s new high performance material Vi 250 seals air at temperatures of up to 250 °C, even over the long term. Furthermore, the all-round compound also impresses thanks to its excellent media resistance, and is also resistant to chemicals such as for example all types of hydrocarbons.
FKM possesses extraordinarily good resistance to numerous specific media and chemicals, for example: mineral oils; aliphatic, aromatic and chlorinated hydrocarbons, plus concentrated or diluted acids and weak alkalis. Resistance to water vapor is however limited. Thanks to its extraordinary polymer structure, Vi 250 demonstrates excellent mechanical resistance and outstanding resistance to aging.
Vi 250 has been specially developed for use in applications with continuous high temperatures, demonstrating sustained resistance to the medium air at up to 250 °C. This chemically resistant all-rounder is used in the compressor and compactor industry.
It also offers low gas permeability, good resistance to steam and high chemical resistance
C. Otto Gehrckens